atomarc - I have a 55.1. 55.1 has open drive, no torque tube. Rear axle is on top of the springs rather than underneath. This makes the shock mounts totally different. The rear springs are different. If a 55 1st the rims will only have 3 hubcap clips instead of 6. If original colors, the grill back half is black in 55, white in 54. The hood badge has red stripes in 54, black in 55. I'm not certain but also hear there is access to use a handcrank in 54, not in 55.
GMCpanel - MAYBE he should have known, but regardless of who made the error a refund should be automatic.
